1 files changed, 79 insertions, 0 deletions
diff --git a/spec/scripts/changed-feature-flags_spec.rb b/spec/scripts/changed-feature-flags_spec.rb
new file mode 100644
index 00000000000..5c858588c0c
--- /dev/null
+++ b/spec/scripts/changed-feature-flags_spec.rb
@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+
+load File.expand_path('../../scripts/changed-feature-flags', __dir__)
+
+RSpec.describe 'scripts/changed-feature-flags' do
+  describe GetFeatureFlagsFromFiles do
+    let(:feature_flag_definition1) do
+      file = Tempfile.new('foo.yml', ff_dir)
+      file.write(<<~YAML)
+        ---
+        name: foo_flag
+        default_enabled: true
+      YAML
+      file.rewind
+      file
+    end
+
+    let(:feature_flag_definition2) do
+      file = Tempfile.new('bar.yml', ff_dir)
+      file.write(<<~YAML)
+        ---
+        name: bar_flag
+        default_enabled: false
+      YAML
+      file.rewind
+      file
+    end
+
+    after do
+      FileUtils.remove_entry(ff_dir, true)
+    end
+
+    describe '.extracted_flags' do
+      shared_examples 'extract feature flags' do
+        it 'returns feature flags on their own' do
+          subject = described_class.new({ files: [feature_flag_definition1.path, feature_flag_definition2.path] })
+
+          expect(subject.extracted_flags).to eq('foo_flag,bar_flag')
+        end
+
+        it 'returns feature flags and their state as enabled' do
+          subject = described_class.new({ files: [feature_flag_definition1.path, feature_flag_definition2.path], state: 'enabled' })
+
+          expect(subject.extracted_flags).to eq('foo_flag=enabled,bar_flag=enabled')
+        end
+
+        it 'returns feature flags and their state as disabled' do
+          subject = described_class.new({ files: [feature_flag_definition1.path, feature_flag_definition2.path], state: 'disabled' })
+
+          expect(subject.extracted_flags).to eq('foo_flag=disabled,bar_flag=disabled')
+        end
+      end
+
+      context 'with definition files in the development directory' do
+        let(:ff_dir) { FileUtils.mkdir_p(File.join(Dir.tmpdir, 'feature_flags', 'development')) }
+
+        it_behaves_like 'extract feature flags'
+      end
+
+      context 'with definition files in the ops directory' do
+        let(:ff_dir) { FileUtils.mkdir_p(File.join(Dir.tmpdir, 'feature_flags', 'ops')) }
+
+        it_behaves_like 'extract feature flags'
+      end
+
+      context 'with definition files in the experiment directory' do
+        let(:ff_dir) { FileUtils.mkdir_p(File.join(Dir.tmpdir, 'feature_flags', 'experiment')) }
+
+        it 'ignores the files' do
+          subject = described_class.new({ files: [feature_flag_definition1.path, feature_flag_definition2.path] })
+
+          expect(subject.extracted_flags).to eq('')
+        end
+      end
+    end
+  end
+end